<template>
  <div>
    <!-- 面包屑导航 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>分类参数</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card>
      <!-- 提示信息 -->
      <el-alert title="注意:只允许为第三级分类设置相关参数!" type="warning" show-icon :closable="false"></el-alert>
      <!-- 选择商品分类 -->
      <el-row class="cat_opt">
        <el-col>
          <span>选择商品分类：</span>
          <!-- 级联选择器 -->
          <el-cascader
            v-model="selectedkeys"
            :options="cateList"
            :props="cateProps"
            @change="handleChange"
          ></el-cascader>
        </el-col>
      </el-row>

      <!-- tags 页签区域 -->
      <el-tabs v-model="activeName" @tab-click="handleClick">
        <!-- 动态参数区域 -->
        <el-tab-pane label="动态参数" name="many">
          <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible= true">添加参数</el-button>
          <el-table :data="manyTableData" border stripe>
            <!-- 插入行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染的tag标签 -->
                <el-tag
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="attr_name" label="参数名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>

        <!-- 静态属性区域 -->
        <el-tab-pane label="静态属性" name="only">
          <el-button type="primary" :disabled="isBtnDisabled" @click="addDialogVisible= true">添加属性</el-button>
          <el-table :data="onlyTableData" border stripe>
            <!-- 插入行 -->
            <el-table-column type="expand">
              <template slot-scope="scope">
                <!-- 循环渲染的tag标签 -->
                <el-tag
                  v-for="(item,i) in scope.row.attr_vals"
                  :key="i"
                  closable
                  @close="handleClose(i,scope.row)"
                >{{item}}</el-tag>
                <!-- 输入的文本框 -->
                <el-input
                  class="input-new-tag"
                  v-if="scope.row.inputVisible"
                  v-model="scope.row.inputValue"
                  ref="saveTagInput"
                  size="small"
                  @keyup.enter.native="handleInputConfirm(scope.row)"
                  @blur="handleInputConfirm(scope.row)"
                ></el-input>
                <el-button
                  v-else
                  class="button-new-tag"
                  size="small"
                  @click="showInput(scope.row)"
                >+ New Tag</el-button>
              </template>
            </el-table-column>
            <el-table-column type="index"></el-table-column>
            <el-table-column prop="attr_name" label="属性名称"></el-table-column>
            <el-table-column label="操作">
              <template slot-scope="scope">
                <el-button
                  type="primary"
                  icon="el-icon-edit"
                  @click="showEditDialog(scope.row.attr_id)"
                >编辑</el-button>
                <el-button
                  type="danger"
                  icon="el-icon-delete"
                  @click="removeParams(scope.row.attr_id)"
                >删除</el-button>
              </template>
            </el-table-column>
          </el-table>
        </el-tab-pane>
      </el-tabs>
    </el-card>

    <!-- 添加的对话框 -->
    <el-dialog
      :title="'添加'+ textTitle "
      :visible.sync="addDialogVisible"
      width="50%"
      @close="addDialogClose"
    >
      <el-form
        :model="addForm"
        :rules="addRules"
        ref="addFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item :label="textTitle" prop="attr_name">
          <el-input v-model="addForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addParams">确 定</el-button>
      </span>
    </el-dialog>

    <!-- 修改的对话框 -->
    <el-dialog
      :title="'修改'+ textTitle "
      :visible.sync="editDialogVisible"
      width="50%"
      @close="editDialogClose"
    >
      <el-form
        :model="editForm"
        :rules="editRules"
        ref="editFormRef"
        label-width="100px"
        class="demo-ruleForm"
      >
        <el-form-item :label="textTitle" prop="attr_name">
          <el-input v-model="editForm.attr_name"></el-input>
        </el-form-item>
      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editParams">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
export default {
  data() {
    return {
      cateList: [],
      selectedkeys: [],
      cateProps: {
        expandTrigger: 'hover',
        value: 'cat_id',
        label: 'cat_name',
        children: 'children'
      },
      activeName: 'many',
      cateId: 0,
      manyTableData: [],
      onlyTableData: [],
      addDialogVisible: false,
      addForm: {
        attr_name: ''
      },
      addRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          { min: 2, max: 12, message: '长度在 2 到 12 个字符', trigger: 'blur' }
        ]
      },
      // 修改
      editDialogVisible: false,
      editForm: {
        attr_name: '',
        attr_id: 0
      },
      editRules: {
        attr_name: [
          { required: true, message: '请输入参数名称', trigger: 'blur' },
          { min: 2, max: 12, message: '长度在 2 到 12 个字符', trigger: 'blur' }
        ]
      }
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.cateList = res.data
      // console.log(res)
    },
    handleChange() {
      this.getParamsData()
    },
    handleClick() {
      console.log(this.activeName)
      this.getParamsData()
    },
    async getParamsData() {
      // 判断是否为三级级联选择器
      if (this.selectedkeys.length !== 3) {
        this.selectedkeys = []
        this.manyTableData = []
        this.onlyTableData = []
        return
      }
      //  是三级级联选择器
      // console.log(this.selectedkeys)
      this.cateId = this.selectedkeys[2]
      //  获取参数
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes`,
        { params: { sel: this.activeName } }
      )
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.$message.success(res.meta.msg)

      res.data.forEach(item => {
        item.attr_vals = item.attr_vals ? item.attr_vals.split(',') : []
        item.inputVisible = false
        item.inputValue = ''
      })
      // console.log(res.data)
      // 判断是参数还是属性
      if (this.activeName === 'many') {
        this.manyTableData = res.data
      } else {
        this.onlyTableData = res.data
      }
    },
    addDialogClose() {
      this.$refs.addFormRef.resetFields()
    },
    addParams() {
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return
        const { data: res } = await this.$http.post(
          `categories/${this.cateId}/attributes`,
          {
            attr_name: this.addForm.attr_name,
            attr_sel: this.activeName
          }
        )
        if (res.meta.status !== 201) return this.$message.error(res.meta.msg)
        this.$message.success(res.meta.msg)
        // console.log(res)
        this.addDialogVisible = false
        this.getParamsData()
      })
    },
    // 修改的
    async showEditDialog(id) {
      const { data: res } = await this.$http.get(
        `categories/${this.cateId}/attributes/${id}`
      )
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.editForm = res.data
      this.editDialogVisible = true
    },
    editDialogClose() {
      this.$refs.editFormRef.resetFields()
    },
    editParams() {
      this.$refs.editFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写完整的属性信息')
        // console.log(this.editForm)

        const { data: res } = await this.$http.put(
          `categories/${this.cateId}/attributes/${this.editForm.attr_id}`,
          {
            attr_name: this.editForm.attr_name,
            attr_sel: this.activeName,
            attr_vals: 'abc'
          }
        )
        // console.log(res)
        if (res.meta.status !== 200) return this.$message.error('用户添加失败')
        this.$message.success(res.meta.msg)
        this.editDialogVisible = false
        this.getParamsData()
      })
    },
    async removeParams(id) {
      // console.log(id)
      const confirmRuler = await this.$confirm(
        '此操作将永久删除该用户, 是否继续?',
        '提示',
        {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }
      ).catch(err => err)
      if (confirmRuler !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      const { data: res } = await this.$http.delete(
        `categories/${this.cateId}/attributes/${id}`
      )
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.$message.success(res.meta.msg)
      this.getParamsData()
    },
    // 文本框失去焦点
    handleInputConfirm(row) {
      // console.log(row)

      // 判断输入的值的长度是否为0，如果是这清空返回
      if (row.inputValue.trim().length === 0) {
        row.inputValue = ''
        row.inputVisible = false
        return
      }
      // 有内容就进行添加
      row.attr_vals.push(row.inputValue.trim())
      row.inputValue = ''
      row.inputVisible = false
      // console.log(row.attr_vals)

      this.setValue(row)
    },
    async setValue(row) {
      // 向后台请求数据
      const { data: res } = await this.$http.put(
        `categories/${this.cateId}/attributes/${row.attr_id}`,
        {
          attr_name: row.attr_name,
          attr_sel: row.attr_sel,
          attr_vals: row.attr_vals.join(',')
        }
      )
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
      this.$message.success(res.meta.msg)
      row.inputValue = ''
      row.inputVisible = false
    },
    showInput(row) {
      row.inputVisible = true
      //  $nextTick:在页面上元素被重新渲染之后，调用回调函数的代码
      this.$nextTick(_ => {
        this.$refs.saveTagInput.$refs.input.focus()
      })
    },
    handleClose(i, row) {
      row.attr_vals.splice(i, 1)
      this.setValue(row)
    }
  },
  computed: {
    isBtnDisabled() {
      if (this.selectedkeys.length !== 3) {
        return true
      }
      return false
    },
    textTitle() {
      if (this.activeName === 'many') {
        return '动态参数'
      } else {
        return '静态属性'
      }
    }
  }
}
</script>

<style lang="less" scoped>
.cat_opt {
  margin: 15px 0;
}
.el-tag {
  margin: 10px 12px;
}
.input-new-tag {
  width: 120px;
}
</style>
